A diagonal support beam is attached to the gate of a fence as shown. Which angles must be congruent in order for the top and bottom sides of the gate to be parallel?
A) ∠ 1 and ∠ 2
Eliminate
B) ∠ 3 and ∠ 4
C) ∠ 1 and ∠ 4
D) ∠ 1 and ∠ 3